Grinding-mill.



PATENTED JULY 10, 1906.

M. P, ABBE'. GRINDING MILL.

APPLI OATION FILED OOT.28. 1905.

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PATENTED JULY 10, 1906.

M. F. ABEL. GRINDING MILL. APPLICATION FILED 00T.28,1905.

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MAX'nlAs ii oF QiRlifiBiNG-iViILLI.

of the United States,"resi'din "New York city, Manhattan, county an State of New York, have invented new and useful Improvements in Grinding-Mills, of which the following is a specification.

This invention relates to a grinding-mill in which the properly-ground particles do not become unduly powdered by being returned to the grinding-surfaces. y invention the ground particles are evenly over the screen, so that packin is prevented and a uniform output is insured.

In the accompanying drawings, Figure 1 is a vertical section of my improved grindingmill; Fig. 2, a plan of the carrier; Fig. 3, a

side view of the fli ht; Fig. 4, an end view,

partly in section, of the flight; and Fig. 5, a top view thereof.

The letter a indicates the casing of the grinding-mill, containin thebed-plate I), having the corrugated grin ing flan e or ring I). Within casing a is stepped the s aft 0, turning in bearings c c and rotated by pulley c Shaft c engages the hub d of an annular carrier (1, having radial arms (1 The carrier d is provided with the beaters d, that coact with the grinding-flange b. The material to be ground is conveyed from hopper 6 through duct 6 and opening of carrier d into the chamber f, from which it passes to the grinding-surfaces.

An upri ht cylindrical screen g, extending upwardly om flange b to cover a of casin a, divides the latter into an inner chamber and an outer chamber 41. The ground particles pass from inner chamber h through screen 9 into outer chamber a, from whence they escape through outlets '11. Means are provided for liftin the ground particles along the inner sur ace of screen 9, so that they become evenly distributed over the same. These means are as follows:

The carrier (1 has a pair of lu s (1 from which rise a pair of pivots is. These pivots are embraced by the tubular hubs Z of upright wings or flights Z, extending above the heaters, partly across chamber h, and adapted to throw the ground particles against screen The flights Z are adjustable to change their inclination with relation to the screen and to thus permit the mill to be set for ground particles of different mesh. Thus set in a radial direction the particles passing through the screen will Specification of Letters Pa Patented.July l0,1906.-

Application filed ocata' 28, 1905. etsam; '284j'775j be smaller than when'the flights are set at an angle,.the size of the'p'arti'c les increasing wit the incli'riatio fibf 't he flights." The adjustment of each flight is efliected by a bolt m, passing through a perforated rib d of carrier (1 and through an eye 1 of flight l. The bolt m carries a spring m and a nut m on opposite sides of the flight, so that by manipulating the nut the flight maybe readily adjusted. The forward or workin surface of flight Z is provided with a series 0 horizontal grooves Z and intervening horizontal ribs 1*. he ribs 1 are perforated, as at 1 to reduce the resistance of the air during the rotation of the flight. The grooves Z form a series of superposed pockets or furrows which tend to retain the uplifted particles in their raised position and direct them against the screen. In operation the centrifugal force, to ether with the suction generate by the ights, causes the ground particles to ascend within chamber h. As these particles are encountered by the flights they creep up along the same and are by the furrows Z subdivided into a series of horizontal strata facing the screen 9 at different elevations. From the against the screen and discharged into chamber 01, the insufficiently-ground particles returning to the beaters.

It will be seen that the flights cause the up er as well as the lower parts of the screen to be uniformly utilized, so that the working area of the screen is increased. In this way uniformity in the output of the mill is insured, while undesirable regrinding is prevented and the capacity of the mill is enlar ed.

T Vhat I claim is 1. In a rinding-mill, a grinding-ring, com bined with a rotatable beater, a cylindrical screen above the rinding-ring, a grooved flight inclosed by t e screen, an means for rotatably mountingthe flight, substantially as specified.

2. In a grindingmill, a screen, combined with a flight having a series of furrows an intervening perforated ribs, and means for rotatably mounting the flight, substantially as specified.

3. In a grinding-mill, a grinding-ring, combined with a rotatable beater, an upright cylindrical screen above the rin and an up right rotatable flight inclosed y the screen i above the beater, substantially as specified.

4. In a grinding-mill, a grinding-ring, comfurrows the ground particles are thrown flight, and means for adjustably connecting" 10 said flight t0 the carrier above the beater,

substantially as specified.

6. In a grinding-mill, a grinding-ring, combined with a rotatable carrier having a a screen above the grinding-ring, a flight pivoted to the carrier above the beater, I5 and a bolt that adjustably connects the flight to the beater, substantially as specified. Signed by me at New York city, Manhattan, New York, this 27th day of October, 1905. I

MAX F. ABBE Witnesses:

FRANK v. BRIESEN, WILLIAM SOHULZ. 

